Prosecution Insights
Last updated: October 26, 2026

Zannatul Ferdous, USPTO Patent Examiner

Listed by the USPTO as FERDOUS, ZANNATUL

Tech Center 3600 • Art Units: 2853 2858 2867 3611

This examiner grants 84% of resolved cases

Analysis

FERDOUS, ZANNATUL has 630 resolved cases in Tech Center 3600 and art unit 2853. The allowance rate is 84.4%, the interview lift is 16.7%, and the median time to allowance is 861 days. The record indicates a substantial examination history, a favorable allowance outcome, and a median timeline that should be incorporated into filing and portfolio planning.

The listed companies are Nihon Micron Co., Ltd., Samsung Electronics Co., Ltd., and Honda Motor Co., Ltd. The listed firms are MERCHANT & GOULD P.C., Brown, Winick, Graves, Gross, Baskerville, and DORITY & MANNING, P.A. The interview figure supports considering examiner interviews as part of a broader response plan, while the allowance rate makes early attention to claim scope and distinguishing disclosures especially practical.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Performance Statistics

84.4%
Allow Rate
+32.4% vs TC avg
668
Total Applications
+16.7%
Interview Lift
861
Avg Prosecution Days
Based on 630 resolved cases, 2023–2026

Rejection Statute Breakdown

5.6%
§101 Eligibility
27.1%
§102 Novelty
51.3%
§103 Obviousness
11.6%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
18932987 SOCKET RANKING METHOD FOR SEMICONDUCTOR TEST APPARATUS AND SEMICONDUCTOR TEST METHOD USING THE SOCKET RANKING METHOD Non-Final OA Samsung Electronics Co., Ltd.
18817583 BATTERY STATE DETERMINATION METHOD AND BATTERY STATE DETERMINATION SYSTEM Final Rejection HONDA MOTOR CO., LTD.
19042173 MAGNETIC FIELD MEASUREMENT DEVICE Non-Final OA TDK Corporation
18949503 FORMATION CAPACITY-GRADING APPARATUS AND PROBE SET DETECTION METHOD Non-Final OA ZHEJIANG JINKO ENERGY STORAGE CO., LTD.

Facing This Examiner?

IP Author analyzes examiner patterns and generates tailored response strategies with the highest chance of allowance.

Build Your Strategy

Who Appears Before This Examiner

Top companies before this examiner

Law firms appearing most often

Frequently Asked Questions

What is examiner Zannatul Ferdous's allowance rate?

84.4% of resolved applications examined by Zannatul Ferdous were allowed (630 resolved cases), compared with 72.7% across Art Unit 2853 over the last five years.

Does an interview help with examiner Zannatul Ferdous?

This examiner's interview lift is +16.7 percentage points: the difference in allowance rate between resolved applications that had an examiner interview and those that did not.

How long does examiner Zannatul Ferdous take to allow a patent?

Applications allowed by Zannatul Ferdous took 861 days on average from filing to allowance.

Which art unit does examiner Zannatul Ferdous work in?

Zannatul Ferdous examines applications in Art Unit 2853 in Tech Center 3600 (Transportation, E-Commerce & Mechanical Systems).

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month